Adrià Julià Lundgren
Senior Frontend Engineer · React · TypeScript · Design Systems
About
Frontend Engineer focused on modern React architecture, TypeScript and scalable design systems. I build high-performance interfaces that combine technical robustness with refined user experience. Comfortable working in small teams where code quality and architecture decisions matter.
Recent years centred on React 19, TypeScript, Vite and Web Components, with prior experience in Angular and Vue. Intensive practice in AI-Assisted Development workflows for refactoring, documentation and code review.
Core Stack
Core: React 19 · TypeScript · Vite · JavaScript (ES6+) · HTML5 · CSS3 Patterns: Web Components · LitElement · Context API · Hooks · BFF (Node/Express) Testing: Vitest · React Testing Library · Chai/Mocha Styles: Styled Components · SCSS/SASS · Tailwind · BEM · Design Tokens Tooling: Git · npm · Webpack · GitHub Actions · Render · GitHub Pages Design: Figma · Design Systems Architecture · Accessibility (WCAG) AI: Applied prompt engineering · Claude Code · Cursor · AI-assisted refactor
Highlighted Experience
Zara Web Challenge — Napptilus / Inditex (2026)
Full-stack SPA for a smartphone catalogue. React 19 frontend + Context API. BFF in Node.js/Express with image processing (Sharp), API proxy with normalisation and LRU cache. Multilingual (ES/CA/EN), dark mode, skeleton loaders, animated transitions, tests with Vitest.
React 19 TypeScript Vite Styled Components Node.js Sharp i18next Vitest
Frontend Developer — Minsait / Fundación BBVA (fbbva.es)
Advanced development of the OpenWeb ecosystem. Modular architecture with Web Components and LitElement, integrated with BBVA Corporate Frameworks (Cells). REST API consumption and unit testing with Chai/Mocha.
LitElement Web Components JavaScript ES6+ REST APIs Chai/Mocha SCSS
Senior Frontend — Newshore / Vueling Airlines (vueling.com)
High-traffic interfaces and web apps. Modular components integrated with REST APIs. Node.js for tooling and SCSS for a large-scale Design System, in a SCRUM team.
Angular JavaScript Node.js SCSS REST APIs Design Systems
Senior Developer — BeeData Analytics (beedataanalytics.com)
Complex reporting engines. Custom Web Components for data visualisation integrated with REST APIs. Scalable frontend architectures on Node.js.
Web Components JavaScript ES6+ D3.js REST APIs Node.js
Frontend Developer — Editorial Planeta / Casa del Libro (casadellibro.com)
Migration of legacy components to a modern modular JavaScript structure. Implementation of refined digital experiences.
VueJS JavaScript SCSS REST APIs
Other Relevant Projects
ByteBerry Studio (2023–present) · Modular frontend architecture for corporate clients: ccib.es (multilingual block-based system), bandalux.com (premium UI/UX with Node.js + SCSS).
Education
Postgraduate in Multimedia Programming · Universitat Pompeu Fabra (UPF) Degree in Graphic Design · EAAOA Llotja, Barcelona
Recent continuous learning: Advanced React/Redux Architecture (ImaginaGroup) · Angular Zero to Expert (Udemy) · Agile/SCRUM (Barcelona Activa)
Languages
Catalan and Spanish: native · English: Professional Working Proficiency
20+ years in web development. Detailed CV with full history available on request.